My father was an engineer for the Department of Defence. . . . a smart guy. That being said, he was/is absolutely CLUELESS with regards to religion, and although he opposed my upbringing as a JW by my mother, he never really posed a good argument against it. He just got angry.
Speaking to him now, he realizes this wasn't ever his strong point. Sure he's great with mathematics and problem solving in the physical world. . . but not so great at critical thinking skills/reasoning through bullshit. I think a lot of engineers are the same way. I call it "engineer brain" . . . . really damn smart with regards to problem solving in the physical world. . . . but that's it.